Strainer.



W. s.y ELLIOTT..

` STRAINBR.

APPLICATION FILED JUNE 24, 1909,

y Patented Oct. 19, 1909.

. I i zsHBETs-SHBET 2 f WILLIAM s. ELLIoTT, or PITTsBUne, PENNsYLvnNIA..

STRAINER.

SpecificationA of Letters Yatent.

Application led June. 24, 1909. Serial No. 504,093.'

To all whom it may concern:

.Be it known that I, WILLIAM S. ELLIOTT, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful lmprovemcnt in Strainers, of which the following is .a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention has relation to the class of strainers, and is designed tb provide av strainer of improved construction having a duplicate arrangement of strainer baskets or cages,` together with means whereby either one of the strainers can be cleaned or renewed, while the other one remains in operation.

A further object is to provide a strainer of this character, the casing of which can be made as an integral casting and without joints, except at the top where separate seating rings for the strainer elements are' employed.

' tudinal section of a strainer embodying my invention; Fig.l 2 is a transverse section: Fig. 2a is a detail view; Fig. 31is a' side view showing a modiiication; Figli 'is an end view of the strainer .shown in Figmf, partly broken away. Referring first to the form of my inven tion in the form ofFigs. 1 and 2, the numeral 2 designates the casing of the strainer which is -cast in one integral piece, with openings 2 at the top. The casing has at one end an inlet connection 3, and at the opposite end an outlet connection 4, said connections preferably communicating with the interior of the casing at different levels, or at dierent sides of a partition member. Seatedv on the top of the casing around the openings 2, are removable rings 2b having packing 2, and secured-by the stud bolts 2i.

5 and. 6 designate two cylinders or barrels, which are arranged side byr side within the casing, said cylinders or barrels being open at both their upper and lower ends.l Placed centrally in each of these cylinders or barrels is a strainer basket or cage 7, which may be of any well known character, such as perforated metal, and which is preferably of decreasing diameter toward its lower en'd. These cages or baskets are open at their upper ends, and are secured at their lower ends to the valve heads 8 in the manner hereinafter described. `Each of these heads has a central hub portion 9 provided with an interior screw thread, which enga es .the thread of a screw shaft l0 provide at its lower end portion with a worm Wheel 11. rlfhese screw shafts are stepped at their lower ends in bearings formed by screw plugs or bushings 1 2 inserted in openings in the bottom wall of the casing 2. Secured in each valve head 8 and extending upwardly there-r from are two or more bolts or rods 13, which loosely engage inwardly projecting lugs 14' on the interior of the barrel or cylinder, and are provided with nuts 1 5 at their upper ends. The upper circumferential. edges of the heads 8 are preferably chamfered or beveled as shown at 16 to seat against the corresponding chamfer or beyel 17 at the lower ends of the cylinders or barrels 5 and 6, said heads acting as valves or closures for Y the bottoms of the cylinders or barrels when the latter are elevated into position for cleaning as shown at the right-hand side of Fig. 1. The upper ends of the cylinders or barrels are also surfaced or chamfered as show-n at 18 to iit the seats 19 on the rings 2*,f said seats surrounding the openings 2a through which access is had for cleaning, for inserting and removing or repairing the valves and screen cages or baskets. These openings 2'l are normally closed by the removable covers 21, provided with' packing Patented oet. 19, 1909.

22 and secured by the bolts 22?. Secured in the hubportion 9 of each head 8 vis a ver-l tical sleeve`or tube 23,'which extends centrally upward and above the upper end of the same. These sleeves or jtubes surround and protect the screw shafts 10 when the strainers are in their lower working position, and leakage around the screw, and upwardly through these tubes or sleeves is prevented, by means of the screw plugs 24 inserted in the upper ends of the tubes or sleeves. For the purthro'ugh the cage or basket posel of obtaining a positive connection between the valve heads and'strainer baskets or cages, the hub portions of the valve heads are provided with lugs 9a, and the bottoms of the baskets or cages have slots adapted to .pass over these lugs.A After the baskets or '.ing a positive connection for the baskets or cages, by means of which they will be positively drawn down with the barrel or cylin- 'will be rot-ated to .thereby actuate the screw der 5 as lthe strainer is lowered to its working position. Each barrel or cylinder is also preferably provided near its upper end with theexteriial lugs or flange 26, which engages a cross partition member 27 of the casing, and also a seat 28.011 the wall of the casing to support the cylinderl or barrel in its lowered position.

29 is a longitudinal shaft, which is supported at its ends in suitable bearings 30 in the casing `walls near the bottom of the casing, one or more-intermediate bearings 3l being also preferably provided. This shaft carries worms 32 and 33 of opposite 'thread,'and which engage respectively the worm wheels 11 of the two screw shaft-s l0.

vfIhe shaft is extended exteriorly of the casy ing at one end through a stiiliing box 34. -On vthis projecting end of the shaft4 is a chain Wheel 35 connected by a chain 36 with a hand wheel 37 mounted on a stub shaft 38 secured `in a projecting lug 39 on the casing. By turning this hand wheel, the shaft 29 shafts 10 to simultaneously raise one strainer' and lower the other. The hand wheel might be applied directly tothe end of the shaft 29; but ordinarily the strainer will set in too low a position to make this possible, and hence I prefer to gear the shaft 29 to the shaft of the hand wheel at a higher elevation.

The operation will be readily understood. With the parts in the position shown in Fig. l, the left-hand barrel i', with its contained strainer cage or basket is in operative position, while the right-hand cylinder or barrel With-its contained strainer cage or basket is raised into position for cleaning. 'lhe water contained within the chamber of the casing enteis the strainer cage or basket at itsupper end, and passes downwardly therethrough and out into the lower portion of said chamber below the cross-member k27 which acts as a partition between the upper and lower portions of said 'chamber so that substantially all the water entering the upper portion of the chamber is compelled to pass through the strainer cage or basket to machthe lower portion with which the outlet connection communicates. In the lowered position of the parts, the barrel or cylinder 5 is -.vipported on thecross-member 27 and seat 28, and the valve head 8 is drawn down I vto its lowered position7 thereby opening the v.other strainer has been lowered into operative position.

The forni of the invention shown in Figs. 3 and t is similar to that shown in Figs. l and 2, except that instead of connecting the two screw shafts lOlby gearing so that they will be simultaneously actuated, I provide each of the shafts l0 with a separate actuating shaft 40, each of'said shafts having its own hand wheel 4l. Inr this forni of the invention it will be obvious that either strainer may be raised or lowered independently of the other.

The advantages of the invention will be apparenti. As soon as one of the strainers becomes clogged, it can be raised to position .to be cleaned while the other one is lowered to operative position. AIii the forni of the invention shown in Figs. 2:3 and 4, vboth straiiiers may be lowered to operative position at the same time7 if desired. The entire apparatus is simple in its construction; the

casing` can be formed as an integral casting, without, joints, except at the top openvarious means for raising and lowering the- -straniere can be provided', and various other changes made.

What I claim is 1. In strainingapparatus, an integral cas,

ing hailing inlet and outlet chambers, two straining elements within the easing, means for raising and lowering said elements, and

means for closing the lower endof each element when said element is in its raised posltion and. for opening said lower` end when the element is in' its lowered position; substantially as described.l 2. VStraining apparatus,l comprising an/integral casing or sliell'provided with inlet and outlet compartments, and having cleaniiigopenings in one wall of the inlet compartment, straining elements within the casing and movable from thev outlet` compartiso - yhead or valve,

. iiection between the ment into the inlet compartment, and means for closin the lower end of each element when the atter is in its raised position and for opening the lower end of said element when the element is in its lowered position; substantially as described.

3. Straining apparatus, comprising a casing-having inlet and outlet compartments, two movable straining elements within the casing, and means for simultaneously movin the said elements in opposite directions; su stantially as described. i

4. In a strainer, a straining element comprising a cylinder or barrel open at its ends, a head or valve adapted to closetlie lower `end of the cylinder or barrel, a strainer cage or basket supported b the central ortion only of the head or va ve and exten ing within the cylinder or barrel, an actuating shaft engaging the head or valve, and a loose connection between the head or valve and the cylinder or barrel; substantially as described.

5. In a strainer, a straining element comprisiiig a cylinder or barrel open at its ends,

a head or valve arranged to close the lower end of the cylinder or barrel, a loose connection between the head or valve and the cylinder or barrel, a strainer cage or basket supported by a screw shaft'- engagng the head or valve,and means for actuating said shaft; substantially as described.

6. In a strainer, a straining element coin- 'prising a cylinder or barrel. open at its ends, a head or valve arranged to close the lower end of the cylinder or barrel, a loose conneetion between the head or valve and the cylinder or barrel, a strainer cage or ,basket supported by the head or valve, and a tube orsleeve secured to the head or valve and into which the screw shaft is arranged to extend; substantially as described.

7. In a strainer, a strainer element comprising' a cylin er or barrel open at itsends, a head or valve arranged to close the lower end of the cylinder or barrel, a loose con head or valve and the or basket cylinder or barrel, a strainer cage a tube or supported by the head or valve,

sleeve secured to the head or valve and into ed to extend," oi the sleeve which the screw shaft is arran means for closing the upper en the central portions of the or tube, and a connection between the sleeve or tube and the cage or basket; substantially as described.

8. ln a strainer, a casing having a cleaning opening in its upper wall, a seating surface surrounding said opening, a vertically moving strainer element comprising a cylinder or barrel open at its ends, and a strainer cage or basket within the barrel, said bai'- rel having a seating surface at its upper edge adapted to coperate with the seating surface surrounding said opening, means for raising and lowering lthe barrel and the strainer cage, and means for closing the lowei' end of the barrel when the latter is in its raised position Jsubstantially as described.

9. In u strainer, a casing consisting of an integral casting having a partition wall, and a -pluralit of access openings at one side of the partition wall, separate seatinfr rings secured to the casting around saidp openings, strainer elements having seating surfaces arranged to coact with surfaces of the seating rings, and removable covers' for said openings; substantially as described.

10. ln a strainer, a easing consisting of an integral casting having a partition wall, and :i plurality of access openings at one side of the partition wall, separate seating rings se cui-ed to the casting around said openings, removable covers for said openings, said rings having seating surfaces, and strainer elements having seating .surfaces arranged to coact therewith; substantially as described.

11. A multiple strainer, com tegral casing havin" inlet an artinents or chain ers, the inlet chamber iaving access-openings iii one wall thereof, a plurality of strainer elements movable from the inlet compartment into the outlet compartment 'below said openings, covers for closing the said openings, and seating rings which vseat the covers and alsol the strainer elements when the latter are moved into the voutlet chamber or compartment; substantially' as described.

' VIn testinnmy whereof, I' have hereunto set my hand.

WILLIAM S. ELLIOTT. Witnesses: t' r.,'F. y1`inisiirrs,

M. v ConwiN.

yrising an inoutlet coin- 

